JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2024
·
IF 2.6
Kong Xin,Yan Yongde,Deng Yuan,Wang Xuepeng,Ding Li,Xue Yun,Pan Jing,Wang Jingping,Liu Wei,Ren Yueming
Online monitoring of lanthanide fission product concentrations has been a great challenge in the pyrochemical reprocessing of spent nuclear fuels. Electrochemical techniques, with the advantages of accuracy and timeliness, provide a feasible strategy. In this work, the relationship between lanthanum ion (La(III)) concentration and reaction current was investigated by various electrochemical methods in LiCl–KCl eutectic salt. Tafel test results show that there is a linear relationship between the exchange current density ( i 0 ) and ion concentration ( i 0 = 0.06618 x + 0.04409). In addition, according to the comparative analysis of electrochemical test results, it is found that anodic stripping voltammetry is a potential ion concentration detection technology. The peak current ( i pc ) and ion concentration satisfy the relationship: i pc = 0.08503 x − 0.02245. According to the equation, the calculated La(III) concentration is almost consistent with that analyzed by inductively coupled plasma atomic spectrometer (ICP-AES), which provides a plausible way for ion concentration monitoring in high-temperature molten salt.
研究领域:
核化学
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分析化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 18
·10542
·
IF 6.208
Yuheng Qiu,Kaiqi Ding,Liwen Tang,Ziyu Qin,Mengting Li,Xueqiong Yin
The demand for rare earth metal increases rapidly in the modern high-tech industry and therefore the accumulation of rare earth metal ions from an aqueous environment becomes a significant concern worldwide. In this paper, a water-recyclable chitosan-based La3+-imprinted thermoresponsive hydrogel (CLIT) was prepared to accumulate La3+from solution. The CLIT was characterized by DSC, FITR, Raman spectroscopy, XPS, and SEM, which revealed obvious reversible thermosensitivity and imprinted sites of La3+ions. An adsorption capacity of 112.21 mg/g to La3+ions was achieved on CLIT under its optimum adsorption conditions (pH 5, 50 °C, 60 min). The adsorption could be well illustrated by second-order kinetics and Freundlich isotherm models. The La3+-adsorbed CLIT could be recycled only by rinsing with 10 °C cold water, with a desorption rate of 96.72%. After ten cycles of adsorption-desorption, CLIT retained good adsorption capability. In the solution containing six ions, the adsorption coefficients kLa3+/Mn+of CLIT were 2.04–3.51 times that of non-imprinted hydrogel, with kLa3+/Y3+, kLa3+/Gd3+, kLa3+/Al3+, kLa3+/Fe3+and kLa3+/Cu2+being 1.67, 2.04, 3.15, 2.72 and 4.84, respectively.Keywords:thermoresponsive hydrogel;La3+-imprinting;rare earth metal
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Guanfeng Lin,Yongzhi Xiong,Guilong Wang,Simin Li,Rongyuan Jiang,Beili Lu,Yandan Chen,Biao Huang
Adsorption and selective adsorption are effective means of separating rare earths (REs) from aqueous solutions and reducing heavy metal contamination. In this work, bagasse was used as carbon source and phytic acid as phosphorus source and activator, and a simple synthesis strategy was applied to prepare the effective adsorbent P-doped porous carbon (PC) of lanthanum ions (La 3+ ). Doping of P was helpful to enhance the adsorption and selectivity of porous carbon to La 3+ . Compared with the samples without P-doping, the adsorption capacity of PC on La 3+ was increased by >4 times, and the theoretical maximum adsorption capacity is as high as 342.2 mg g −1 , which was greater than that of other reported carbon-based materials. In addition, the selective adsorption of PC on La 3+ was as high as 96.07 % and 71.07 % not only in the multi-ion coexistence system of La 3+ , Ni 2+ , Zn 2+ , Co 2+ , Ca 2+ , and Na + , but also in the La 3+ /Na + (1:50) coexistence system with very low La 3+ content, respectively. The adsorption of La 3+ on PC-800 is mainly chemisorption , where C-P-O, C/P=O and C-O-P groups are the main active sites for adsorption and improves the selectivity. This work can furnish some useful message on designing and synthesizing of carbon-based adsorbent, which has excellent adsorption selectivity in polyionic and low La 3+ coexistence systems.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 30
·期 21
·19598-19608
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IF 2.195
Li Pengfei,Zhang Hong,Gao Caiyun,Jiang Guoxiang,Li Zhicheng
N egative temperature coefficient (NTC) ceramics based on simple ZnO were prepared and investigated in present work, where slight amount of Al- and La- ions were added as semiconductor dopants, and Cu-ions were selected as the sintering agent and property modificator. All the prepared ZnO-based ceramics have a wurtzite structure and show typical NTC characteristic. For various contents of Al-, La- and Cu- ions in ZnO-based ceramics, ρ 25 can be adjusted from 0.65 kΩ cm to 3.28 MΩ cm, and B values were obtained in range of 2500 K to 5850 K. The ageing treatment at 125 °C for 600 h in air revealed that the ZnO-based ceramics have high thermal stability with the resistance shift < 2%. The complex impedance spectra were applied to analyze the electrical performance.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Lin Yang,Tingjiao Liu,Zheng Li,Changqing Liu,Feifeng Wang,Chunshan Wu
The application of metal organic frameworks (MOFs) for the recovery of low concentrations of rare-earth elements (REEs) has attracted increasing attention due to the precious value of REEs resources. In this study, UiO-66-COOH was modified by trifluoroacetic acid (TFA) to not only promote material crystallization and the pore structure verified by XRD and SEM characterization, but successfully enhance its adsorption capacity and achieve perfect selectivity for Lanthanum ion (La 3+ ). The adsorption capacity for UiO-66-COOH-24TFA was increased by 58% compared to unmodified material. The adsorption mechanism and application were comprehensively investigated. By adsorption kinetics , isotherm and thermodynamic studies, it was found that the adsorption process mainly exhibited monolayer adsorption with spontaneous endothermic-chemisorption characteristics, and –COOH of the modified materials (UiO-66-COOH-24TFA) played an important role, which was confirmed by XPS. Moreover, UiO-66-COOH-24TFA was applied to REEs actual wastewater by successive six-stage adsorption process , where the overall recovery rate on La 3+ reached 94.1% under the coexisting conditions of multiple ions. The application of this acid modified material in the field of the separation and recovery of REEs is of great promise.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2019
·Vol. 30
·期 5
·1483-1489
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IF 1.637
Xiaogang Liu,Yuwen Cheng,Xiu Wang,Minglei Tian,Xiancai Li,Yifeng Yang
Using 3-chloropropyltriethoxysilane as an anchor, the functional monomer linear polyethylenimine(PEI) was grafted on the surface of mesoporous MCM-41. La 3+ was selected as the template ion and epichlorohydrin was used as the crosslinker. A lanthanum ion MCM-41 imprinted polymer (La(III)-IIP-PEI/MCM-41) was prepared, and a non-ion-imprinted polymer (NIP-PEI/MCM-41) was arranged in the same manner. The La 3+ surface imprinted polymer was characterized by means of infrared spectrometer, thermogravimetric(TG) analyzer, and scanning electron microscope(SEM). The optimal adsorption conditions and selective adsorption properties of La(III)-IIP-PEI/MCM-41 for La 3+ were determined by static adsorption method and adsorption performance. Experiments show that the maximum adsorption capacity of La(III)-IIP-PEI/MCM-41 can reach 212.69 mg g 1 . Adsorption equilibrium can be reached at 30 min. Quasi-second-order kinetic model can be used to describe its adsorption mechanism. La(III)-IIP-PEI/MCM-41 also has a strong selectivity for La 3+ .
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CARBOHYDRATE RESEARCH
·
2012
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IF 2.332
Junhui Xue,Xiaohui Hua,Weihong Li,Limin Yang,Yizhuang Xu,Guozhong Zhao,Gaohui Zhang,Chunping Li,Kexin Liu,Jia’er Chen,Jinguang Wu
Three novel lanthanum chloride–erythritol complexes (LaCl 3 ·C 4 H 10 O 4 ·5H 2 O (LaE(I)), LaCl 3 ·C 4 H 10 O 4 ·3H 2 O (LaE(II)), and LaCl 3 ·1.5C 4 H 10 O 4 (LaE(III)) were synthesized and characterized by single crystal X-ray diffraction, FTIR, far-IR, THz, and Raman spectroscopy. The coordination number of La 3+ is nine. LaE(I) and LaE(II) have similar coordination spheres, but their hydrogen bond networks are different. Erythritol exhibits two coordination modes: two bidentate ligands and tridentate ligands in LaE(III). Chloride ions and water coordinate with La 3+ or participate in the hydrogen-bond networks in the three complexes. Crystal structures, FTIR, FIR, THz, and Raman spectra provide detailed information on the structures and coordination of hydroxyl groups to metal ions in the metal–carbohydrate complexes.
研究领域:
化学
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材料科学
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DOI
PubMed
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 13
·10164-10169
·
IF 4.6
Shuai Han,Yunhan Qin,Dandan Zhang,Cuifang Li,Xiaoxue Du,Lijuan Liu,Songbo Yuan,Fangfang Wei,Baoxin Yang,Zhiying Ma
Red-emissive carbon dots (RCDs) were fabricated using a simple solvothermal method with Nile blue A sulphate and malic acid. The obtained RCDs exhibited good water solubility, excellent stability and a high luminescent quantum yield. The effect of RCDs on the growth of cotton sprouts was further explored, and it was found that the RCDs could effectively promote growth by enhancing root vitality. Furthermore, it was found that adding lanthanum to the RCD solutions could achieve better promotion, with the optimum concentration measured to be 0.02 mg mL−1 of RCDs for mixed solutions, which was much lower than that of the RCD solution alone (0.03 mg mL−1). Further analysis results showed that adding lanthanum could enhance the absorption of RCDs by the cotton sprouts, which might be induced by the enhancement of endocytosis in root cells triggered by lanthanum. This work not only provides novel long-wavelength emissive carbon dots with excellent biological activity but also holds positive significance for plant physiology and agricultural production.
研究领域:
植物学
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农业科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
·
2022
·
IF 0.243
Huang Yuhua,Liu Xiaogang,Shi Minxin,Qin Yuanyuan,Li Xiancai
The lanthanum ion imprinted polymer (La-IIP/SBA-15/Y) was successfully synthesized by the surface ion imprinting method. Using La-IIP/SBA-15/Y as the adsorbent to adsorb lanthanum ions, the overall empirical conditions were optimized, and the best exploratory conditions were finally found. The pH of the solution was 2; the adsorption equilibrium was reached in 60 min and the saturated adsorption capacity was 562.95 mg/g La-IIP/SBA-15/Y adsorbed gadolinium ions in the study of its adsorption process and found that it conforms to the Langmuir isotherm adsorption model, and the adsorption reaction is a spontaneous reaction, and it also conforms to the quasi-second-order kinetic model. The selectivity of the adsorbent was explored experimentally, and the results showed that La-IIP/SBA-15/Y has good selectivity, and experimental elution and regeneration performance. The best elution effect is 2 mol/L hydrochloric acid. La-IIP/SBA-15/Y has good stability and can be reused.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Yi Zhang,Donghao Liu,Weidong Guo,Yigang Ding
The development of stable and inexpensive adsorbents for La(III) recovery from wastewater is of great importance for rare earth industries. In this work, two novel N -rich covalent organic frameworks (COFs) synthesized via a one-step solvothermal method were termed as COF-PA-CC and COF-ML-CC, and employed as the adsorbents for removal of rare earth (RE) ions from aqueous solution. The structures and properties of COFs were characterized with X-ray diffractometer, total reflection infrared spectrometer, field-emission scanning electron microscopy, X-ray photoelectron spectroscopy, nitrogen adsorption–desorption instrument and thermogravimetric analyzer. The results revealed that COF-PA-CC composed of nanowires with the average length of 500 nm, whereas COF-ML-CC displayed the spherical morphology with the diameter of 100 ∼ 300 nm. Specific surface areas of COF-PA-CC and COF-ML-CC were calculated to be 82.13 and 191.08 m 2 /g, respectively. The adsorption process of La(III) was well-fitted with pseudo-second-order kinetic model and Langmuir isotherm model, exhibiting the high adsorption capacities of 150.88 and 168.19 mg/g for COF-PA-CC and COF-ML-CC after 120 min. Moreover, the influences of pH, temperature, different RE ions on adsorption performances were comprehensively tested, yielding an optimal adsorption condition (pH = 5.5, 65 °C and 120 min) and a better affinity for some light RE ions. Importantly, the fabricated COFs possess the excellent reusability after five adsorption-regeneration cycles, remaining 97.84 % and 95.51 % of initial capacities for COF-PA-CC and COF-ML-CC, respectively. The adsorption mechanism revealed that the complexation interaction between La(III) and the unoccupied N sites of N -rich COFs was recommended to interpret the remarkable adsorption performance of La(III) on the basis of the characterization analysis after the adsorption with elemental mapping, EDS and XPS. Consequently, these low-cost and robust COFs with abundant active N sites supplied a promising strategy for the recovery of RE ions from wastewater.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2016
·Vol. 34
·期 4
·483-490
·
IF 1.811
Zhang Li-na,Song Yi-hu,Zheng Qiang
Poly(methyl methacrylate) (PMMA) based ionomers with different lanthanum (La(III)) contents (PMMA-XLa) synthesized by free radical solution polymerization were applied to poly(vinyl chloride) (PVC) resins as a kind of multifunctional aids, and their performances were evaluated by measuring the static stability time, initial discoloration, transparency, fusion behavior and tensile strength of the modified PVC. The ionomers with proper lanthanum (La(III)) contents show a better thermal stability efficiency in comparison with traditional stabilizer lanthanum stearate. Meantime, they can accelerate PVC plasticization more efficiently than PMMA. The rigid PVC products stabilized with the ionomers present good transparency and enhanced tensile strength.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 41
·25258-25265
·
IF 3.361
Long Liu,Sheng Chang,Yan Wang,Hexiang Zhao,Shuteng Wang,Chengfeng Zheng,Yingying Ding,Shixue Ren,Jiguo Zhang,Yuan-Ru Guo
An Fe3O4/carboxymethyl cellulose (Fe3O4/CMC) magnetic biosorbent was prepared using the ion-imprinting technology, where La(III) was used as the template ion. The morphology and structure of Fe3O4/CMC were characterized by SEM, FTIR and XRD. It is found that nano Fe3O4 with inverse spinel structure can distribute in CMC and endow the composite with good magnetic properties. The adsorption performance such as adsorption capacity, influence of pH and initial concentration were fully explored. The prepared Fe3O4/CMC is revealed to have good adsorption properties with Qmax of 61.5 mg g−1, in line with the pseudo-second-order kinetic model. When handling the multi-ion coexistence solution of Cu(II), Ni(II) and Cd(II), Fe3O4/CMC shows high selective adsorption for La(III). Meanwhile, cycling experiments find that the adsorption capacity is only slightly reduced (less than 5%) after 5-time reuse. Good adsorption properties, high selectivity and easy recovery give the newly-synthesized Fe3O4/CMC biosorbent broad application potential in the treatment of La(III)-containing wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）